When he talks about having to save to be able to buy $800 heads I know from my own experience that a bunch of valve work is going to need a lot more savings as well. And with me running them pretty much out of the box I can say at the very least I didn't lose anything over my well worked over Factory heads... And they had brand name parts 202 valves and a little bit of massaging as well... And cost way more than the speed Masters...